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Differences What are the advantages of each

Front view of GeForce GTX 670

Reasons to consider the
Nvidia GeForce GTX 670

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Significantly better 3DMark vantage graphics score 31,610 vs 12,900 Around 2.5x better 3DMark vantage graphics score
Significantly better 3DMark06 score 29,150 vs 20,370 Around 45% better 3DMark06 score
Better PassMark score 5,382 vs 2,479 Around 2.2x better PassMark score
Higher clock speed 915 MHz vs 776 MHz Around 20% higher clock speed
Significantly higher memory bandwidth 192.3 GB/s vs 91.9 GB/s More than 2x higher memory bandwidth
Significantly higher effective memory clock speed 6,008 MHz vs 3,828 MHz More than 55% higher effective memory clock speed
Better 3DMark 11 graphics score 9,600 vs 3,280 Around 3x better 3DMark 11 graphics score
Better floating-point performance 2,459.5 GFLOPS vs 894 GFLOPS More than 2.8x better floating-point performance
Higher texture rate 102.5 GTexel/s vs 37.2 GTexel/s More than 2.8x higher texture rate
More memory 2,048 MB vs 1,024 MB 2x more memory
Higher pixel rate 25.62 GPixel/s vs 9.31 GPixel/s More than 2.8x higher pixel rate
More shading units 1,344 vs 288 1056 more shading units
More texture mapping units 112 vs 48 64 more texture mapping units
Significantly higher memory clock speed 1,502 MHz vs 957 MHz More than 55% higher memory clock speed
Better PassMark direct compute score 2,547 vs 983 More than 2.5x better PassMark direct compute score
Slightly more render output processors 32 vs 24 8 more render output processors
Front view of GeForce GT 645

Reasons to consider the
Nvidia GeForce GT 645

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Lower TDP 102W vs 170W 40% lower TDP

Benchmarks Real world tests of GeForce GTX 670 vs GT 645

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

3DMark 11 Graphics Industry standard benchmark that tests DirectX 11 GPU performance

3DMark Vantage Graphics Industry standard benchmark that tests DirectX 10 GPU performance

3DMark06 Industry standard benchmark that tests DirectX 9 GPU performance

PassMark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

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